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Open House Archive

Welcome to the Open House Archive - your central repository for accessing all previous Open House buildathons and projects.

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Builder Highlight

Most Hackathon Won

Most Project Built

Builder Highlight

Most Buildathon Won
M

Manobendra Mandal

Kolkata, India
Champion
3
No.1
V

Vivek Sahu

India
Champion
2
No.2
s

simp1e

china
Champion
2
No.3
Most Project Built
z

zorzalcripto

regencia
Champion
54
No.1
R

Rick

California
Champion
44
No.2
n

nescampos

Chile
Champion
26
No.3

Project Highlight

Project Highlight

EduBricks

EduBricks is a platform enabling fractional ownership of tokenized real estate, making investments more accessible

Champion

7th Place

Arbitrum X EDU Chain Mini-Hack

Pencil Finance

Bringing $3 Trillion in Student Loans On-Chain

Champion

1st Place

Arbitrum X EDU Chain Mini-Hack

Stylish Course to Stylus Smart Contract Development

A comprehensive course on deploying and interacting with Stylus smart contracts on Arbitrum and EDU Chain, featuring a full-fledged Stylus IDE for seamless deployment and interaction.

Champion

First Prize

Arbitrum X EDU Chain Mini-Hack

VineFinance

Vine Finance is a decentralized, modular revenue strategy protocol.

Champion

Third Prize

Arbitrum X EDU Chain Mini-Hack

Orbital

A next-gen AMM that supports 2, 3, or even 10,000 stablecoins in a single pool, scaling concentrated liquidity into higher dimensions.

+1
Champion

Second prize

Arbitrum Open House India: Online Buildathon

zkArb SDK

zkArb SDK is a developer toolkit that makes building zero-knowledge apps on Arbitrum simple and fast. It provides plug-and-play Circom circuit compilation, proof generation, and ready-to-deploy verifier contracts, so developers can focus on dApps instead of cryptography.

Champion

Honorable Surprise Mention

Arbitrum Open House India: Online Buildathon

Unice Protocol

Prediction market but everyone is winner.

Tech StackNext, Solidity
Builder
IInsizzaki Alfitra
DeFi

ArbiFlow Agentic Settlement

Agentic invoice escrow on Arbitrum with x402 payments, AP2-style mandates, ERC-8004-style reputation, TEE validation, service bonds, dispute evidence, and settlement receipts.

Tech StackReact, Next, Web3, Node, Solidity, Ethers
Builder
AAidar Khusaenov
AIDeFiInfra

Phylax SDK

Institutional-grade control layer for autonomous AI agents, ERC-4337 smart accounts, delegated session keys, and centralized gas sponsorship to enforce secure, bounded, and verifiable on-chain.

Tech StackWeb3, Ethers, Solidity, Pimlico, Viem, Permissionless, ERC-4337, Phylax SDK
Builder
AAufa Rafly
AIOtherInfra

ArbiCycle

ArbiCycle is a trustless rotating savings circle (Ajo / Chama / Stokvel) on Arbitrum. 500M people worldwide save this way through one coordinator who can disappear with the pot — ArbiCycle replaces that coordinator with smart contracts. Chainlink VRF picks the payout order provably fairly, Chainlink Automation triggers rotations and penalties autonomously, and idle contributions earn yield on Aave v3. Defaulters are auto-kicked and their on-chain reputation drops. Live on Arbitrum Sepolia, deployable to Robinhood Chain. The tradition stays — the single point of failure goes

Tech StackReact, Solidity, Web3, Node
Builder
CChristian Paul
SocialFiDeFi

CoverFi

The world's first DeFi on-chain Credit Default Swap for RWA tokens.

Tech StackSolidity, Typescript, Javascript
Builder
MMike Nse
DeFiRWA

siri mirim4 copy

teste 4

Tech StackWeb3, Solidity, Go, Move
Builder
Zzorzalcripto cripto
DeFiDAOOther

Arbiguard

ArbiGuard is an autonomous risk firewall for tokenized-asset protocols. It scores live transactions on-chain in a Stylus risk engine, enforces protocol-signed risk policies, and trips a hysteresis circuit breaker the moment an exploit pattern crosses a blocking threshold — then writes the threat signature to a shared registry so every other protected pool is immunized against the same attack. Built for the capital coming to Arbitrum and Robinhood Chain, where a single exploit on tokenized equities is a regulatory event, not just a TVL loss.

Tech StackReact, Web3, Ethers, Solidity, Node
Builder
IIbrahim Abdulkarim
DeFiAI

RWA.Index

Autonomous AI-managed tokenized-stock index fund on Robinhood Chain. ERC-4626 vault with an LLM portfolio manager bounded by on-chain guardrails.

Tech StackReact, Next, Web3, Solidity, Node, TypeScript, viem, Foundry
Builder
YYehor Ivashchenko
RWADeFiAI

WorkProof

A decentralized freelance escrow marketplace

Tech StackNext, React, Solidity, Web3, Node, Python
Builder
MMfon Ante
SocialFiInfraAI

RevGuard

Tech StackReact
Builder
DDogukan Gundogan
DeFi

ArbiAgent

Tech StackPython, Groq, Gradio, LLaMA 3.3 70B, web3.py, Arbitrum, render, CoinGecko API
Builder
MMax David

Blindference

Confidential AI inference with end-to-end encryption, decentralized quorum verification, and on-chain economic settlement on Arbitrum.

Tech StackReact, Web3, Ethers, Node, Python, Solidity
Builder
AAbhishek Panwar
AIInfraGaming
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